IT0015 wage type is not caluclated problaby in payroll

Hi Experts,

I've a WT in IT0015 which takes input value as "Days"

when I enter 2 records for the same WT in the same month

in payroll simulation the first one has correct values. but the second record is missed up.

EXAMPLE:
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in 01/2017 I've entered 2 WT of the same type

WT 9045 = 8 Days
WT 9045 = 2 Days

when I run the payroll the result is showing the first record has 8 days which is correct. but the second record is also set to 8 days... which should be 2.

here is the payroll result

and here is the pcr for WT 9045

when I remove the PCR from the schema. the result as days are correct.

what should I do in the PCR to fix this issue?

thanks